Chronological then:
- The Phantom Menace
- Attack of the Clones
- Clone Wars (seasons 1&2)
- The Clone Wars movie
- The Clone Wars series
- Clone Wars (season 3)
- Revenge of the Sith
- Droids animated series
- A New Hope
- The Holiday Special
- The Empire Strikes Back
- Caravan of Courage
- The Battle for Endor
- Return of the Jedi
Not sure on the animated Clone Wars series, since Season 3 leads right into Episode III, but the first two seasons should occur before the CG series. They don't really fit together anyway, but neither do the Ewoks series/movies. Lucasfilm just WANTS them to tie in.